Page 293, footnote 2:

When simplifying, it is recommended to look at the exponent of each term one by one. For example, the exponent on \( \pi \) is \( 1 – \frac{3}{2} = -\frac{1}{2} \), which means that the simplified expression contains a factor \( \pi^{-\frac{1}{2}} \), or \( \frac{1}{\sqrt{\pi}} \). The exponent on \( m \) is \( \frac{3}{2} – \frac{1}{2} – 1 = 0 \), which means that \( m \) does not appear in the simplified expression.